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(No Model.)

H. R. ALLEN.

SYRINGE ATTACHMENT. No. 330,083. Patented'Nov. 10, 188-5 H MW /60'ra/u.

M ya mm N. PETERS, Phnio-Umwgnphor, Wishinglflll, D, Q

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rroaaon n. ALLEN, or INDIANAPOLIS, INDIANA.

SYRl NGE ATTACH W! ENT.

SPEGIEIGATION forming part of Letters'Patent No. 330,083, dated November10, 1885.

Application filed July 11, 1885. Serial No. 171,9!18. (No intdcl.)

T0 aZZ whom it may concern.-

Be it known that I HORACE It. ALLEN, a citizen of the United States,residing at Indianapolis, in the county of Marion and State of Indiana,have invented a new and useful Syringe Attachment, of which thefollowing is a specification.

The invention in this case relates to syringe attachments.

The objects are, first, to deaden the sound and prevent the unpleasantnoise caused by the striking of the lower end of theinductiontube, ofmetal or other hard substance, against the vessel; second, to preventlint or other foreign substance from passing into and obstructing thevalves of the syringe; third, to supply a weight which shall beconstantly in proper situation to hold the end of the induction-pipebelow the surface of the liquid, and thus prevent entrance of air intothe syringe.

The invention consists, first, in a tube of rubber or other suitablesoft material adapted to fit upon the induction end of an appropriatesyringe.

The invention consists, further, in the combination, with a tube ofrubber or other suitable soft material, of a strainer.

The invention consists, finally, of the combination, with a tube adaptedto fit on the induction end of an appropriate syringe, of a strainerapplied at the outer portion of such tube and a weight placed within thetube.

In the accompanying drawings, forming a part of this specification,similar letters represent corresponding parts.

Figure 1 is a vertical sectional view of a syringe attachment embodyingall the features of my invention, and showing the attachment applied toa syringe, the syringe being represented by dotted lines. Fig. 2 is aperspective view of the attachment embodying all the features of myinvention, and shown by itself ready for attachment to a syringe end orother suitable pipe. Fig. 3 is a perspective view of the weight andstrainer separate from each other, and with the covering of rubber orother soft material removed.

A is a short tube, of soft rubber or other suitable material, adapted tobe passed over the induction end of an appropriate syringe.

B is a weight, of lead or other heavy substance, which is made conicalor slightly tapering to facilitate its insertion into the tube, and, asshown, is provided with a central perforation, b. The tube and weightmay be employed alone upon a suitable syringe, and the weight mayencircle the tube.

0 is a strainer, preferably of wire-cloth, which fits into the lower endof the tube A, and may be used with the tube alone. The lower end of theweight is preferably concave, as at b, and in the construction of theentire device it is Well to solder the lower end of the weight at itsrim upon the rim of 'the strainer, this strainer being preferably convexexteriorly and concave toward the Weight.

The normal diameter of the tube is slightly less than that of either theweight or strainer, and so upon either one of these, or both of them,being pushed into the tube, the tube serves as a retaining-devicewithout additional fastening.

By passing the tube alone over the metallic induction end of theordinary syringe the usual unpleasant sound that results from thestriking of this end against the vessel, and which is so hard to avoid,is obviated, since the covering of the metallic end deadens the sound;but I prefer to use the tube in connection with the weight and this withthe strainer. The complete device then. is readily attached to thecommon syringe by simply slipping the end of the syringe-tube into theend a of the tube A.

In practical operation, when the entire attachment is applied to asyringe, the weight B will drop to the bottom of the liquid to beinjected, and will remain under the liquid, preventing the admission ofair. In syringes heretofore the rubber pipe was liable to push its endabove the surface of the fluid, admitting the air and annoying the uservery much as the air wouldbe injected into the body. Great annoyance wasalso occasioned by sediment, lint, &c., being drawn into the syringe andpreventing the working of the valves. The wire-cloth Ois designed to actas astrainer and prevent foreign matter from entering the syrlnge.

ICO

I find by practical use that my attachment above described prevents anyor all these defects in a simple and inexpensive way.

Having thus fully described my invention,

5 what I claim is- 1. Atube of rubber or other suitable soft material,in combination with and adapted to fit upon and inclose the metallic orother hard induction end of an appropriate syringe, whereby IO the'noise incident to the striking of theinduc- 7 tion end of the syringeagainst the vessel is obviated, as set forth.

2. The combination of a supplemental tube adapted to be fitted upon theusual induction I 5 end of the ordinary syringe and a strainer carriedby such tube, as and for the purpose set forth.

8. The combination, with atube of rubber or other suitable soft materialto be fitted upon the induction-tube of a syringe, of a strainer 20 heldby such tube and a weight carried by it to keep the end of the tubebelow the surface of the liquid, substantially as described.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses. 25

HORACE R. ALLEN.

